DOI: 10.1615/ICHMT.2012.CHT-12
ISBN: 978-1-56700-303-1
ISSN: 2578-5486
COMBINED NUMERICAL AND ANALYTICAL METHOD FOR FIN ARRAY HEAT TRANSFER
ABSTRACT
Fins and fin arrays are used for cooling heat generating components in electronics. Heat transfer composed of simultaneous convection and conduction can be solved numerically using commercial CFD codes but this is time consuming, especially if the goal is to optimize the geometry. A faster method is obtained by adopting analytical expressions for convection and solving only conduction numerically. In the paper this type of approach and equations are presented. The validity of the method is checked by comparing the results to measured data and to results obtained purely numerically. It was observed that the calculation time using the method presented is much shorter compared to that if velocity and temperature fields of the flow and solid are solved numerically. Thus, the method is a very suitable tool, for instance, in a multiobjective optimization where hundreds of solutions are required.